Hexcel® HexPly® 8551-7 Epoxy Matrix

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Hexcel® HexPly® 8551-7 Epoxy Matrix
Categories:	Polymer; Thermoset; Epoxy; Epoxy Cure Resin
Material Notes:	HexPly® 8551-7 is an amine-cured, toughened epoxy resin system supplied with unidirectional graphite fibers. Typical reinforcement is continuous IM7 (intermediate modulus) graphite filaments. HexPly® 8551-7 was developed to operate in a temperature environment of up to 200°F (93°C). IM7/8551-7 is an extremely damage-resistant system, recommended for structural applications requiring high strength, stiffness, and damage tolerance. Conventional thermoset resin processing equipment and techniques can be used to process IM7/8551-7 prepreg tape. Features: Service temperature up to 200°F (93°C), Extremely damage-resistant system, 350°F (177°C)
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Physical Properties	Metric	English	Comments

Density	1.272 g/cc	0.04595 lb/in³
Moisture Absorption at Equilibrium	3.1 %	3.1 %
Viscosity	1900 cP @Temperature 129 - 149 °C	1900 cP @Temperature 264 - 300 °F

Mechanical Properties	Metric	English	Comments
Tensile Strength, Yield	99.3 MPa	14400 psi
Elongation at Yield	4.4 %	4.4 %
Tensile Modulus	4.09 GPa	593 ksi
Fracture Toughness	3.51 MPa-m½	3.19 ksi-in½

Thermal Properties	Metric	English	Comments
Maximum Service Temperature, Air	93.3 °C	200 °F
Glass Transition Temp, Tg	116 °C	241 °F	Wet
	157 °C	315 °F	Dry

Processing Properties	Metric	English	Comments
Gel Time	8.00 - 16.0 min @Temperature 177 °C	8.00 - 16.0 min @Temperature 351 °F

Descriptive Properties
Tack Life (days)	40

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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PHEXC045 / 98515

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